<template>
  <div>
    <allHead>
      <template v-slot:mid>教学图片生成助手</template>
    </allHead>

    <div class="bd">
      <div class="chat" v-for="item in conversation">

        <div class="user question" v-if="item.role === 'user'">
          <span>{{ item.content }}</span>
        </div>
        <div class="bot answer" v-if="item.role === 'assistant'">
          AI:
          <div class="bot answer" v-if=" Array.isArray(item.content)">
            <img :src="item.content[0].url" alt="image" />
          </div>
          <div class="bot answer" v-else>
            <span v-html="item.content"></span>
          </div>
        </div>
        
      </div>
      <div v-if="!finish">
        <van-loading vertical>
          <template #icon>
            <van-icon name="star-o" size="30" />
          </template>
          生成中，请稍等...
        </van-loading>
      </div>
    </div>

    <div class="ft">
      <div class="input">
        <input type="text" placeholder="请输入您想要生成的图片" v-model="question">
        <button @click="send">发送</button>
      </div>
    </div>
  </div>
</template>

<script setup>
import allHead from "@/components/allHead.vue";
import { onMounted, ref } from 'vue'
import axios from 'axios'
import { useBookStore } from '@/stores/bookStore.js';

const bookStore = useBookStore();

const book = ref(bookStore.book.book || {})

const finish = ref(true)


const conversation = ref([
  {
    role: "assistant",
    content: `您好！我可以为您生成${book.value.editions}-${book.value.textClass}${book.value.term}-${book.value.subject}-${book.value.unit}-${book.value.content}的相关图片，您可以告诉我您需要什么样的图片，越详细越好。生成完成之后请及时保存。`
  }
])

const question = ref('')

// 发送请求
const send = async () => {
  finish.value = false
  if (question.value.trim() === "") {
    return
  }
  conversation.value.push({
    role: "user",
    content: question.value
  })

  // 发送请求
  const msg = {
    role: "user",
    content: question.value
  }
  // 清空输入框
  question.value = ""

  const res = await axios.post('http://121.43.122.26:3001/tongyi/picture', msg)

  finish.value = true

  conversation.value.push({
    role: "assistant",
    content: res.data.content
  })
}



</script>
<style lang="css" scoped>
.bd {
  height: calc(100vh - 160px);
  background: #f5f7fa;
  overflow-y: auto;
  padding: 1rem 1rem 5rem;
  box-sizing: border-box;
}

.chat {
  margin: 1.5rem 0;
}

.bot.answer {
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  gap: 0.8rem;
}
.bot.answer span {
  background: white;
  color: #333;
  padding: 1rem;
  border-radius: 0 1rem 1rem 1rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  max-width: 85%;
  line-height: 1.5;
  position: relative;
}

.bot.answer img {
  max-width: 100%;
  height: auto;
  border-radius: 0.5rem;
  display: block;
  margin-top: 0.5rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.user.question {
  display: flex;
  justify-content: flex-end;
  align-items: flex-start;
  gap: 0.8rem;
}
.user.question span {
  background: #2563EB;
  color: white;
  padding: 1rem;
  border-radius: 1rem 0 1rem 1rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  max-width: 85%;
  line-height: 1.5;
}

/* 角色标签 */
.bot.answer::before,
.user.question::before {
  content: attr(data-role);
  font-size: 0.8rem;
  color: #999;
  position: absolute;
  top: -1.2rem;
}

/* 加载动画 */
.van-loading {
  padding: 2rem;
  text-align: center;
  color: #666;
}
.van-icon-star-o {
  color: #2563EB;
  animation: spin 1.5s linear infinite;
}

@keyframes spin {
  100% { transform: rotate(360deg); }
}

.ft {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: white;
  padding: 1rem;
  border-top: 1px solid #eee;
  box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
}

.input {
  display: flex;
  gap: 0.5rem;
  max-width: 800px;
  margin: 0 auto;
}

.input input {
  flex: 1;
  padding: 0.8rem 1.2rem;
  border: 1px solid #ddd;
  border-radius: 2rem;
  font-size: 1rem;
  background: #f8f9fa;
  transition: all 0.2s;
}

.input input:focus {
  outline: none;
  border-color: #2563EB;
  background: white;
  box-shadow: 0 0 0 3px rgba(142, 111, 247, 0.1);
}

.input button {
  padding: 0.8rem 1.5rem;
  background: #2563EB;
  color: white;
  border: none;
  border-radius: 2rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.2s;
}

.input button:active {
  opacity: 0.8;
}

/* 移动端适配 */
@media (max-width: 768px) {
  .bd {
    padding: 0.5rem 0.5rem 4rem;
    height: calc(100vh - 115px);
  }
  
  .bot.answer span,
  .user.question span {
    max-width: 90%;
    font-size: 0.9rem;
    padding: 0.8rem;
  }
  
  .ft {
    padding: 0.8rem;
  }
  
  .input input {
    padding: 0.7rem 1rem;
    font-size: 0.9rem;
  }
  
  .input button {
    padding: 0.7rem 1.2rem;
  }

  .bot.answer img {
    max-width: 100%;
    max-height: 60vh;  /* 控制最大高度 */
    object-fit: contain;  /* 保持比例 */
  }
}
</style>